"The fact that a sitting president is pursuing over $20 million in bogus 'damages' against a private citizen, who is only trying to tell the public what really happened, is truly remarkable," said an attorney for Daniels.

News reports about football and brain injuries — one indication of public awareness about the health risks of head injuries on the field — started becoming more common in 2009 and increased each year through the end of the study.

Republicans are seeking hundreds of millions of dollars more for the Department of Homeland Security to expand the number of beds for immigrant detainees and to hire more federal agents to patrol U.S. borders and the country's interior.

In a rare move against an incumbent, a half dozen national groups advancing leftist agendas on gay rights, workers' rights and women's issues mounted a $1 million independent campaign targeting Lipinski.

With many states using antiquated voting machines and with concerns about potential interference in U.S. elections by Russia or other actors, there is rising concern among experts about the need to safeguard American balloting.